Automatic slide-valve cut-off mechanism



4 SheetsSheet 1.

(No Model.)

, M. WILKES. v AUTOMATIC SLIDE VALVE GUT-OFF MECHANISM.

Patented Sept. 18, 1888.

' NVENOR.

AT TEST- fat- (No Model.) 4 Sheets-Sheet 2.

M.. WILKES.

AUTOMATIC SLIDE VALVE GUT-OFF MECHANISM.

No. 389,731. Patented S61) 18, 1888.

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(No Mode l.) 4 Sheets-Sheet 3.

v M. WILKES.

AUTOMATIC SLIDE VALVE GUT-OFF MECHANISM. No. 389,781. Patented Sept. 18,1888.

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(No Model.) I 4 Sheets-Sheet 4.

M. WILKES.

AUTOMATIC SLIDE VALVE GUT-OFF MECHANISM.

No. 89,781. Patented Sept. 18,1888.

AT'T-EST. l I VEN OR .i /mM 'm 7 8 N. PETERS. Piwio filhagrwhr.Washington D. O.

' opposite side.

UNITED STATES PATENT OFFICE.

' MOSES \VILKES, OE TRENTON, NEW JERSEY.

AUTOMATIC SLIDE-VALVE CUT-OFF MECHANISM.

SPECIFICATION forming part of Letters Patent No. 389,731, datedSeptember 18, 1888.

, Application filed Apr-i116, 1888.

To all whom it may concern:

Be it known that I, MosEs WILKES, a citizen of the United States,residing at Trenton, Mercer county, New Jersey, have invented new anduseful Improvements in Automatic Slide-Valve Gut-Off Mechanism, of whichthe following is a specification.

This invention relates to certain new and useful improvements inautomatic slide-valve cut-off mechanism; and it consists, substantially,in such features of arrangement, construction, and combinations ofparts, as will hereinafter be more particularly described;

Figure l is a vertical longitudinal elevation of my improved automaticslide-valve cut-off as when viewed from one side. Fig. 2 is a similarview thereof as when viewed from the Fig. 3 is atop plan view, and Fig.4 is a vertical end elevation.

In former Letters Patent granted me on Februaryl22, 1887, numbered358,318, I have set forth and claimed certain improvements in this classof inventions, and wherein a doubletoed rocker is employed to act on andalter- .nately depress the inner ends of certain levers against theaction of springs which tend to normally-hold such ends up, thedepression of said levers in the manner explained acting to close thecut-off valve by the force ofthe spring carried on its stem. Inconnection with these devices I employ in the Letters Patent referred toseveral other elements or devices, such as stop-blocks on thecutoff-valve stem, reciprocating wedges, gear-wheels operating thewedges through movable connections, &c.

The object of the present invention is to dispense with nearly,if notall, of the contrivances above referred to and to obtain better resultsfrom a much simplified arrangement and less number of parts, therebygreatly economizing over my own as well as other former patents in thisart.

Referencebeing had to the several parts by the letters marked thereon, Arepresents a guide-box,in which the main-valve rod B and thecut-off-valve rod B work back and forth, the said guide-box beingadapted to be bolted to the bed-plate of an engine or otherwise, asOccasion may require. On top of this guidebox is secured by means ofbolts a a'the bedplate 0, on whichthe parts or mechanism con- Serial No.270,826. (No model.)

stituting myinvention aresupported. Secured to each end of the guide-boxis adash-pot, D, and working in these dash pots are the pistons E E,carried by the stem of the cut-off valve B, the said dash-pots beingprovided with cocks I) b, for controlling theamount of air therein, bywhich to regulate the force of the springs inclosing the cut-off valvc.

In my former patent referred to I have set forth the arrangement ofaspring surrounding the cut oH-valve stem, and this spring is gripped bya yoke adj ustably secured to the stem of the main slide-valve. In thepresent instance two springs areemployed on the stem of the cut-offvalve, (one to either end of the guide-box A,) and these springs aregripped by yokes c c, adjustably held on the stem of the mainslide-valve, substantially in like manner as in the formerinstancereferred to. The tension of the springs may be regulated or adjusted atwill by the collars d d, having setscrews, as shown.

F represents a steel catch plate, which is securely fitted in thecut-off-valve stem, and which is engaged by vertically-reciprocatingposts, hereinafter described. This plate is formed longitudinally withan elevated portion, F, by which the engagement of such plate by theposts is effected.

G G represent two sets or pairs of standards securely fastened or boltedto the bedplate O, as represented by the letters e, each pair of suchstandards constituting guides for the vertically-moving posts H- H. Aplate, I, is secured to each side of the standards at their upper endsby means of boltsf, thus forming, I

as it were, boxes for the posts to work in.

The posts H H move in the spaces formed between the standards and sideplates, I I, Y

and each post is provided on its opposite side with a movable steel toe,9, through the medium of which said posts are lifted in the mannerhereinafter described. The said posts pass through the bed-plate O andengage the catchplate F in the manner hereinafter stated.

J J represent pillow-blocks secured to the top of the bed -plate onopposite sides, as shown,and in these blocks is held or supported anoscillating shaft, K, on which shaft are two vibrating rockers, h h,(one on each side of the posts) and two levers, i, keyed to said shaft,

also on opposite sides of the posts, but in a reverse position to eachother. These leversi i are provided with suitable portions (not shown)resting upon the rockers for depressing said rockers on the rocking ofthe shaft K.

L L represent small shafts having their bearings in boxes L L, securelybolted to the tops of the side plates, I I, and to opposite ends ofthese shafts is keyed or fastened a rod, M, which rods are movablyconnected to reciprocating wedges N N through the medium of links k 7;.These wedges act, in the manner hereinafter described, to elevate themovable posts through the action of the governor. Attached, also, to theshafts L L are levers O, movably connected to rods 1 l, which extend upthrough and are connected with the stem of the governor Q. This governoris of the well known construction, and receives rotation from thebelt-drum I, acting through the medium of miter-wheels,and the stem israised and depressed by the action of the governorballs. The governor issupported by a top plate, It, extending across the tops of two verticalstandards, S S, the said plate being secured by bolts, as shown.

T represents a slotted arm keyed on the shaft K, and to which attachmentis made of a pitman-rod attached to or extending from an eccentric onthe engine-shaft, in the usual manner.

From the foregoing description, taken in connection with theaccompanying drawings, it will be seen that nearly all of the operativeparts of my present improvements are in duplicate, a set being to eitherside, and reversely arranged so as to obtain a proper action thereof toraise and lower the movable posts.

It will be seen that while the engine is running the oscillation of theshaft K will cause the rockers to alternately raise and lower themovable posts, and the engagement of the catch-plate by these postsserves to hold the cut-off valve stationary until by the action of thegovernor and the movable connection of its stem with the sliding wedgesthe said posts will be elevated simultaneously, at which moment thespring-actuated cut-off valve will be operated in an obvious manner.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

1. In an automatic cut-off and regulator for engine slide-valves, thecombination, with a governor and its vertically'inovable stem, of twinshafts movably connected to said stem, a main oscillating shaft, twinrockers thereon, twin levers keyed to said main shaft, the reciprocatingwedges, and a movable connection between said wedges and the twinshafts, substantially as described.

2. In a cutoff-valve regulator, the combination, in a movable shaftsupported by suitable bearings, twin rockers upon said shaft, twinlevers thereon, vertically-moving posts having movable toes on theirsides engaged by the rockers for lifting said posts, the reciprocatingwedges, twin shafts movably connected to the governor-stem, and rods atopposite ends of said shafts, movably connected to the wedges by links,substantially as described.

3. In a cutoff-valve regulator, the combination, with the springactuated cut-off valve having in its stem the catclrplatc F, ofvertically-movable posts adapted to engage said plate,and the devicesherein described, where by said posts are elevated simultaneouslythrough the action of the governor and its stem, as set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

MOSES \VILKES.

Witnesses:

.Hoon S. LAIR, XVILLIAM T. WEs'r.

